Add flag trap_on_stub_deopt. We want to be able to trap on hydrogen stub bailouts.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 0d22bc914168eb9fd10d69db7d34023626b8d5a7..6583b47ce233551aa2aeff32ad5898b297bcdd83 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -1004,7 +1004,8 @@ void LCodeGen::DeoptimizeIf(Condition cc,
     __ bind(&done);
   }
 
-  if (FLAG_trap_on_deopt && info()->IsOptimizing()) {
+  if ((FLAG_trap_on_deopt && info()->IsOptimizing()) ||
+      (FLAG_trap_on_stub_deopt && info()->IsStub())) {
     Label done;
     if (cc != no_condition) __ j(NegateCondition(cc), &done, Label::kNear);
     __ int3();